US 12,029,229 B2
Ultrasonic freezing equipment and freezing method using same
Jing Xie, Shanghai (CN); Qijun Xu, Shanghai (CN); Jinfeng Wang, Shanghai (CN); and Yuyao Sun, Shanghai (CN)
Assigned to Shanghai Ocean University, Shanghai (CN)
Filed by Shanghai Ocean University, Shanghai (CN)
Filed on May 10, 2021, as Appl. No. 17/315,410.
Claims priority of application No. 202110049445.9 (CN), filed on Jan. 14, 2021.
Prior Publication US 2021/0259288 A1, Aug. 26, 2021
Int. Cl. A23L 3/375 (2006.01); A23B 4/015 (2006.01); A23B 4/09 (2006.01); A23B 4/26 (2006.01); A23L 3/00 (2006.01); A23L 3/30 (2006.01)
CPC A23L 3/375 (2013.01) [A23B 4/015 (2013.01); A23B 4/09 (2013.01); A23B 4/26 (2013.01); A23L 3/001 (2013.01); A23L 3/30 (2013.01); A23V 2002/00 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An ultrasonic freezing equipment, comprising:
a casing;
a circulating pump system;
an ultrasonic generator;
a vortex-tube freezing device comprising a vortex tube;
a temperature-measuring device;
a hydraulic telescopic mast; and
a net cover;
wherein the casing has a cuboid shape; a recess is provided inside the casing; the recess is of a hexagonal-prism shape, and comprises six side surfaces connected end to end; the recess is configured as a freezing chamber of the ultrasonic freezing equipment, and is configured to accommodate a salt solution; the salt solution is configured to immerse a food to be frozen;
the circulating pump system is in communication with the recess; the circulating pump system is configured to perform a circulating flow of the salt solution in the recess;
a refrigeration coil is arranged in the recess of the casing; the vortex tube comprises a vortex chamber, a cold-end tube and a hot-end tube communicated with each other; the vortex-tube freezing device is connected to the refrigeration coil; the vortex-tube freezing device is configured to adjust a temperature of the salt solution through the refrigeration coil, so as to freeze the food to be frozen in the salt solution;
the ultrasonic generator is configured to emit an ultrasonic wave to the food to be frozen in the salt solution, so as to reduce a damage during a freezing process; the ultrasonic generator comprises six ultrasonic generating plates, and the six ultrasonic generating plates are sequentially arranged on the six side surfaces of the recess; the six ultrasonic generating plates consists of a first ultrasonic generating plate, a second ultrasonic generating plate, a third ultrasonic generating plate, a fourth ultrasonic generating plate, a fifth ultrasonic generating plate and a sixth ultrasonic generating plate; the first ultrasonic generating plate and the fourth ultrasonic generating plate are configured to emit an ultrasonic wave of 0-20 KHz; the second ultrasonic generating plate and the fifth ultrasonic generating plate are configured to emit an ultrasonic wave of 20-40 KHz; and the third ultrasonic generating plate and the sixth ultrasonic generating plate are configured to emit an ultrasonic wave of 40-60 KHz;
a control panel is arranged on the casing, and is configured to control a frequency of the ultrasonic generator;
the temperature-measuring device is arranged near an inside surface of the ultrasonic generator, and is configured to measure a temperature of the salt solution; and
the net cover is connected to the hydraulic telescopic mast; the hydraulic telescopic mast is arranged in the recess, and is connected to a bottom of the recess; the hydraulic telescopic mast is telescopic to drive the net cover to move up and down; and the net cover is configured to press and fix the food.